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dbc6b6ad RP |
1 | /* |
2 | * ac97.c -- ALSA Soc AC97 codec support | |
3 | * | |
4 | * Copyright 2005 Wolfson Microelectronics PLC. | |
d331124d | 5 | * Author: Liam Girdwood <lrg@slimlogic.co.uk> |
dbc6b6ad RP |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify it | |
8 | * under the terms of the GNU General Public License as published by the | |
9 | * Free Software Foundation; either version 2 of the License, or (at your | |
10 | * option) any later version. | |
11 | * | |
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12 | * Generic AC97 support. |
13 | */ | |
14 | ||
15 | #include <linux/init.h> | |
5a0e3ad6 | 16 | #include <linux/slab.h> |
dbc6b6ad RP |
17 | #include <linux/kernel.h> |
18 | #include <linux/device.h> | |
da155d5b | 19 | #include <linux/module.h> |
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20 | #include <sound/core.h> |
21 | #include <sound/pcm.h> | |
22 | #include <sound/ac97_codec.h> | |
23 | #include <sound/initval.h> | |
24 | #include <sound/soc.h> | |
25 | ||
dee89c4d MB |
26 | static int ac97_prepare(struct snd_pcm_substream *substream, |
27 | struct snd_soc_dai *dai) | |
dbc6b6ad | 28 | { |
e6968a17 | 29 | struct snd_soc_codec *codec = dai->codec; |
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30 | |
31 | int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? | |
32 | AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE; | |
7a0a289c | 33 | return snd_ac97_set_rate(codec->ac97, reg, substream->runtime->rate); |
dbc6b6ad RP |
34 | } |
35 | ||
5a8ec343 | 36 | #define STD_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ |
24c053e7 MB |
37 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 |\ |
38 | SNDRV_PCM_RATE_48000) | |
5a8ec343 | 39 | |
85e7652d | 40 | static const struct snd_soc_dai_ops ac97_dai_ops = { |
6335d055 EM |
41 | .prepare = ac97_prepare, |
42 | }; | |
43 | ||
f0fba2ad LG |
44 | static struct snd_soc_dai_driver ac97_dai = { |
45 | .name = "ac97-hifi", | |
3ba9e10a | 46 | .ac97_control = 1, |
dbc6b6ad RP |
47 | .playback = { |
48 | .stream_name = "AC97 Playback", | |
49 | .channels_min = 1, | |
5a8ec343 LG |
50 | .channels_max = 2, |
51 | .rates = STD_AC97_RATES, | |
33f503c9 | 52 | .formats = SND_SOC_STD_AC97_FMTS,}, |
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53 | .capture = { |
54 | .stream_name = "AC97 Capture", | |
55 | .channels_min = 1, | |
5a8ec343 LG |
56 | .channels_max = 2, |
57 | .rates = STD_AC97_RATES, | |
33f503c9 | 58 | .formats = SND_SOC_STD_AC97_FMTS,}, |
6335d055 | 59 | .ops = &ac97_dai_ops, |
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60 | }; |
61 | ||
62 | static unsigned int ac97_read(struct snd_soc_codec *codec, | |
63 | unsigned int reg) | |
64 | { | |
65 | return soc_ac97_ops.read(codec->ac97, reg); | |
66 | } | |
67 | ||
68 | static int ac97_write(struct snd_soc_codec *codec, unsigned int reg, | |
69 | unsigned int val) | |
70 | { | |
71 | soc_ac97_ops.write(codec->ac97, reg, val); | |
72 | return 0; | |
73 | } | |
74 | ||
f0fba2ad | 75 | static int ac97_soc_probe(struct snd_soc_codec *codec) |
dbc6b6ad | 76 | { |
dbc6b6ad RP |
77 | struct snd_ac97_bus *ac97_bus; |
78 | struct snd_ac97_template ac97_template; | |
f0fba2ad | 79 | int ret; |
dbc6b6ad | 80 | |
dbc6b6ad | 81 | /* add codec as bus device for standard ac97 */ |
f0fba2ad | 82 | ret = snd_ac97_bus(codec->card->snd_card, 0, &soc_ac97_ops, NULL, &ac97_bus); |
24c053e7 | 83 | if (ret < 0) |
f0fba2ad | 84 | return ret; |
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85 | |
86 | memset(&ac97_template, 0, sizeof(struct snd_ac97_template)); | |
87 | ret = snd_ac97_mixer(ac97_bus, &ac97_template, &codec->ac97); | |
24c053e7 | 88 | if (ret < 0) |
f0fba2ad | 89 | return ret; |
fb48e3c6 | 90 | |
dbc6b6ad | 91 | return 0; |
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92 | } |
93 | ||
3f775987 | 94 | #ifdef CONFIG_PM |
84b315ee | 95 | static int ac97_soc_suspend(struct snd_soc_codec *codec) |
3f775987 | 96 | { |
f0fba2ad | 97 | snd_ac97_suspend(codec->ac97); |
3f775987 ML |
98 | |
99 | return 0; | |
100 | } | |
101 | ||
f0fba2ad | 102 | static int ac97_soc_resume(struct snd_soc_codec *codec) |
3f775987 | 103 | { |
f0fba2ad | 104 | snd_ac97_resume(codec->ac97); |
3f775987 ML |
105 | |
106 | return 0; | |
107 | } | |
108 | #else | |
109 | #define ac97_soc_suspend NULL | |
110 | #define ac97_soc_resume NULL | |
111 | #endif | |
112 | ||
f0fba2ad | 113 | static struct snd_soc_codec_driver soc_codec_dev_ac97 = { |
591796b8 MB |
114 | .write = ac97_write, |
115 | .read = ac97_read, | |
dbc6b6ad | 116 | .probe = ac97_soc_probe, |
3f775987 ML |
117 | .suspend = ac97_soc_suspend, |
118 | .resume = ac97_soc_resume, | |
dbc6b6ad | 119 | }; |
f0fba2ad | 120 | |
7a79e94e | 121 | static int ac97_probe(struct platform_device *pdev) |
f0fba2ad LG |
122 | { |
123 | return snd_soc_register_codec(&pdev->dev, | |
124 | &soc_codec_dev_ac97, &ac97_dai, 1); | |
125 | } | |
126 | ||
7a79e94e | 127 | static int ac97_remove(struct platform_device *pdev) |
f0fba2ad LG |
128 | { |
129 | snd_soc_unregister_codec(&pdev->dev); | |
130 | return 0; | |
131 | } | |
132 | ||
133 | static struct platform_driver ac97_codec_driver = { | |
134 | .driver = { | |
591796b8 MB |
135 | .name = "ac97-codec", |
136 | .owner = THIS_MODULE, | |
f0fba2ad LG |
137 | }, |
138 | ||
139 | .probe = ac97_probe, | |
7a79e94e | 140 | .remove = ac97_remove, |
f0fba2ad LG |
141 | }; |
142 | ||
5bbcc3c0 | 143 | module_platform_driver(ac97_codec_driver); |
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144 | |
145 | MODULE_DESCRIPTION("Soc Generic AC97 driver"); | |
146 | MODULE_AUTHOR("Liam Girdwood"); | |
147 | MODULE_LICENSE("GPL"); | |
0afe6b90 | 148 | MODULE_ALIAS("platform:ac97-codec"); |